weekday {clock} R Documentation

## Construct a weekday vector

### Description

A weekday is a simple type that represents a day of the week.

The most interesting thing about the weekday type is that it implements circular arithmetic, which makes determining the "next Monday" or "previous Tuesday" from a sys-time or naive-time easy to compute. See the examples.

### Usage

weekday(code = integer(), ..., encoding = "western")


### Arguments

 code ⁠[integer]⁠ Integer codes between ⁠[1, 7]⁠ representing days of the week. The interpretation of these values depends on encoding. ... These dots are for future extensions and must be empty. encoding ⁠[character(1)]⁠ One of: "western": Encode weekdays assuming 1 == Sunday and 7 == Saturday. "iso": Encode weekdays assuming 1 == Monday and 7 == Sunday. This is in line with the ISO standard.

### Value

A weekday vector.

### Examples

x <- as_naive_time(year_month_day(2019, 01, 05))

# This is a Saturday!
as_weekday(x)

# Adjust to the next Wednesday
wednesday <- weekday(clock_weekdays$wednesday) # This returns the number of days until the next Wednesday using # circular arithmetic # "Wednesday - Saturday = 4 days until next Wednesday" wednesday - as_weekday(x) # Advance to the next Wednesday x_next_wednesday <- x + (wednesday - as_weekday(x)) as_weekday(x_next_wednesday) # What about the previous Tuesday? tuesday <- weekday(clock_weekdays$tuesday)
x - (as_weekday(x) - tuesday)

# What about the next Saturday?
# With an additional condition that if today is a Saturday,
# then advance to the next one.
saturday <- weekday(clock_weekdays\$saturday)
x + 1L + (saturday - as_weekday(x + 1L))

# You can supply an ISO coding for code as well, where 1 == Monday.
weekday(1:7, encoding = "western")
weekday(1:7, encoding = "iso")


[Package clock version 0.6.0 Index]